Answer:
see explanation
Explanation:
Under a reflection in the y- axis
a point (x, y ) → (- x, y ) , then
A (1, 1 ) → A' (- 1, 1 )
B (2, 4 ) → B' (- 2, 4 )
C (4, 2 ) → C' (- 4, 2 )
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